A symmetrical parabolic curve passes through point A whose elevation is 23.23m at a distance of 54m from the PC. The elevation of the PC at station 4+100 is 22.56m. The grade of the back tangent is +2% and the length of curve is 120m. a) Compute the grade of the forward tangent. b) Compute the stationing of the highest point of the curve from the PC. c) Compute the elevation of the highest point of the curve.

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